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Three student chemists measured 50.0mL of 1.00 M NaOH in separate styrofoam "coffee cup" calorimeters. Student 1 added 45.0 mL of 1.10 M HCl to the solution of NaOH; Student 2 added 50.0mL of 1.10 M HCl to the NaOH solution. Student 3 added 55.0mL of 1.10 M HCl to the NaOH solution. Each student recorded the temperature change and calculated the enthalpy of neutralization. Two of the chemists will report, within experimental error, the same temperature change for the HCl/NaOH reaction. Identify the two students and explain
When steam (hot water) is passed over iron, hydrogen gas and iron (3) oxide are formed. What weight of steam would be needed to react completely with 100.0g of iron.
Write a balanced molecular equation and a net ionic equation for the reaction aluminum hydroxide with a solution of hydrobromic acid. Include the states of each species. a) balanced molecular equation b) net ionic equation
Magnesium hydroxide is used in several antacid formulations. When it is added to water it dissociates into magnesium and hydroxide ions. Mg(OH)2(s) Mg2+(aq) + 2OH-(aq).
Which element formed, according to the theory of the Big bang, before the first generation of galaxies formed
How many grams of hydrogen can be theoretically formed. How much of which reactant will be left after the reaction is over
A colorless liquid A (C3H6O) was soluble in water and ether, and had a boiling point of 94-96 degrees C. it decolorized a Br2-CH2Cl2 solution and gave a positive ceric nitrate test, Treatment of Compound A with ozone, followed by hydrolysis in the ..
What is the final pH of a solution that contains 0.1 M of H2N-CH2-CH2-NH3+ Cl- and 0.01 M of Cl- NH3+-CH2-CH2-NH3+. The pKa values of the compound are as follows; pKa1= 7.5 and pKa2= 9.5:
2,4,6-Trichlorophenol is considerably more acidic (pKa = 6) than phenol. Draw the resonance structures for the 2,4,6-trichlorophenoxide ion that explain why it is more acidic, and provide ONE sentence explaining the significance of these structures..
Determine how many grams of Phosphorus tri-fluoride will be produced when 40.1 g of F2 mix, and the reaction has a 78.1% yield?
What is the boiling point of a solution made by adding 6.79 g of magnesium chloride to 242.0 g of water?
A mixture of pentane and hexane has a vapor pressure of 258 torr. The standard vapor pressure of pentane is 425 torr. What is the mole fraction of pentane?
How many grams will remain after 98.0 days if Phosphorus-32 has a half-life of 14.0 days Starting with 6.00g of ,?
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